Low Voltage and Low Power CMOS Exponential-Control Variable-Gain Amplifier

Weihsing LIU  Shen-Iuan LIU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A   No.4   pp.952-954
Publication Date: 2004/04/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Circuit Theory
CMOS,  low voltage,  low power,  exponential-control,  VGA,  

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A compact, low voltage, low power and wide output operating range CMOS exponential-control variable-gain amplifier has been presented. The gain control range of the proposed variable-gain amplifier can be about 50.7 dB while the maximum linearity error is about -1.09%. For the case of supply voltage VDD = 2 V, the maximum power dissipation is only 1.6 µW. The proposed circuit has been fabricated in a 0.5 µm 2p2m N-well CMOS process. Experimental results are given to confirm the feasibility of the proposed variable gain amplifier. The proposed circuit is expected to be useful in analog signal processing applications.